Abstract: The paper introduced a design and realizing scheme of surveillance system for fieldwork mobile warehouse. The system takes C8051F120 single-chip microcomputer as main controller, STC89C52 as slave controller, D203S pyroelectric infrared sensor as a core of human-body detection module and MQ-2 smoke sensor as a core of smoke detection module, and adopts CRM2400TNC wireless module to realize communication between main controller and slave controller. The system realizes functions of personnel monitoring and smoke detection in warehouse, monitoring of valuables into and off the warehouse as well as alarming. What's more, alarming system cannot be closed until inputting correct password. The testing result showed the availability and reliability of the system.